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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 398 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.24 × 8 =
  2. 2.52 × 4 =
  3. 3.94 × 4 =
  4. 4.42 × 4 =
  5. 5.111 × 4 =
  6. 6.67 × 4 =
  7. 7.121 × 4 =
  8. 8.42 × 8 =
  9. 9.38 × 4 =
  10. 10.75 × 8 =
  11. 11.95 × 4 =
  12. 12.90 × 4 =
  13. 13.63 × 8 =
  14. 14.50 × 4 =
  15. 15.49 × 8 =
  16. 16.141 × 4 =
  17. 17.159 × 4 =
  18. 18.44 × 4 =
  19. 19.147 × 4 =
  20. 20.51 × 8 =
  21. 21.70 × 8 =
  22. 22.18 × 8 =
  23. 23.65 × 8 =
  24. 24.48 × 4 =
  25. 25.64 × 8 =
  26. 26.24 × 8 =
  27. 27.116 × 4 =
  28. 28.69 × 8 =
  29. 29.154 × 4 =
  30. 30.57 × 8 =
  31. 31.17 × 8 =
  32. 32.23 × 8 =
  33. 33.36 × 8 =
  34. 34.105 × 4 =
  35. 35.59 × 8 =
  36. 36.52 × 8 =
  37. 37.12 × 8 =
  38. 38.51 × 8 =
  39. 39.108 × 4 =
  40. 40.18 × 4 =

Answer key

  1. 192
  2. 208
  3. 376
  4. 168
  5. 444
  6. 268
  7. 484
  8. 336
  9. 152
  10. 600
  11. 380
  12. 360
  13. 504
  14. 200
  15. 392
  16. 564
  17. 636
  18. 176
  19. 588
  20. 408
  21. 560
  22. 144
  23. 520
  24. 192
  25. 512
  26. 192
  27. 464
  28. 552
  29. 616
  30. 456
  31. 136
  32. 184
  33. 288
  34. 420
  35. 472
  36. 416
  37. 96
  38. 408
  39. 432
  40. 72

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